<template>
  <div class="cmt-container">
    <h4>发表评论</h4>
    <hr>
    <textarea placeholder="请评论..." maxlength="120" v-model="msg">
    </textarea>
    <mt-button type='primary' size='large' @click="postComment">发表评论</mt-button>
    <div class="cmt-list">
      <div class="cmt-item" v-for="(item, i) in comments" :key="i">
        <div class="cmt-title">
          第{{i + 1}}楼&nbsp;&nbsp;用户：{{item.user_name}}发表时间：{{item.add_time | dateFormat}}
        </div>
        <div class="cmt-body">{{item.content === '' ? '此用户很懒' : item.content}}</div>
      </div>
    </div>
    <mt-button type='danger' size='large' plain @click="getMore">加载更多</mt-button>
  </div>
</template>

<script>
  import {Toast} from 'mint-ui';
  export default {
    data() {
      return{
        pageIndex: 1,
        comments: [],
        msg: ''
      }
    },
    created () {
      this.getComments();
    },
    methods: {
      getComments() {
        this.$http.get('api/getcomments/'+this.id+'?pageindex='+this.pageIndex).then(result => {
          if (result.body.status === 0) {
            this.comments = this.comments.concat(result.body.message);
          } else {
            Toast('加载失败');
          }
        });
       
      },
      getMore() {
        this.pageIndex ++;
        this.getComments();
      },
      postComment() {
        //
        if (this.msg.trim().length === 0) {
          return Toast('评论内容不能为空');
        }
        //发表评论
        //参数一：请求的URL地址
        //参数二：提交给服务器的数据对象
        //参数三：定义提交时候，表单中数据的格式，已经在全局中定义
        this.$http.post('api/postcomment/' + this.$route.params.id, {content: this.msg.trim()}).then(function(result) {
          if(result.body.status === 0) {
            var cmt = { user_name: '匿名用户', add_time: Date.now(), content:this.msg.trim()};
            this.comments.unshift(cmt);
            this.msg = '';
          }
        });
      }
    },
    props: ["id"]
  }
</script>

<style lang="scss" scoped>
  .cmt-container {
    h4 {
      font-size: 18px;
    }
    textarea{
      font-size: 14px;
      height: 85px;
      margin: 0;
    }
    .cmt-list{
      margin: 5px 0;
      .cmt-item{
        line-height: 30px;
        .cmt-title{
          font-size: 13px;
          background-color: #ccc;
        }
        .cmt-body{
          font-size: 13px;
          text-indent: 2em;
        }
      }
    }
  }
</style>
